HDF5 file, superblock version 2
group /
	attribute Conventions = "CF-1.6"
	attribute cdm_data_type = "point"
	attribute comment = "These data were produced at the University of Bremen in the framework of the ESA GHG-CCI project"
	attribute creator_email = "schneising@iup.physik.uni-bremen.de"
	attribute creator_name = "University of Bremen, IUP, Oliver Schneising"
	attribute creator_url = "http://www.iup.uni-bremen.de/sciamachy/NIR_NADIR_WFM_DOAS/products/"
	attribute date_created = "20160520T132018Z"
	attribute geospatial_lat_max = 90.0
	attribute geospatial_lat_min = -90.0
	attribute geospatial_lat_units = "degree_north"
	attribute geospatial_lon_max = 180.0
	attribute geospatial_lon_min = -180.0
	attribute geospatial_lon_units = "degree_east"
	attribute geospatial_vertical_max = 100000.0
	attribute geospatial_vertical_min = 0.0
	attribute history = "2016 - product generated with WFMD"
	attribute id = "ESACCI-GHG-L2-CH4-SCIAMACHY-WFMD-20030921-fv1.nc"
	attribute institution = "University of Bremen"
	attribute keywords = "satellite, ENVISAT, SCIAMACHY, atmosphere, methane"
	attribute keywords_vocabulary = "NASA Global Change Master Directory (GCMD)"
	attribute license = "ESA CCI Data Policy: free and open access"
	attribute naming_authority = "iup.uni-bremen.de"
	attribute platform = "ENVISAT"
	attribute product_version = "v4.0"
	attribute project = "Climate Change Initiative - European Space Agency"
	attribute references = "http://www.esa-ghg-cci.org/\nhttp://dx.doi.org/10.5194/acp-11-2863-2011\nhttp://dx.doi.org/10.1002/2014EF000265"
	attribute sensor = "SCIAMACHY"
	attribute source = "SCIAMACHY L1B version 7.xx (consolidation W)"
	attribute spatial_resolution = "30km x 60km at nadir (typically)"
	attribute standard_name_vocabulary = "NetCDF Climate and Forecast (CF) Metadata Conventions Version 1.6"
	attribute summary = (text block)
| Weighting Function Modified DOAS (WFMD) is designed to retrieve column-averaged dry air mole fractions
| of atmospheric carbon dioxide and methane from the near-infrared/shortwave-infrared (NIR/SWIR)
| nadir spectra of the SCIAMACHY instrument onboard ENVISAT.
	attribute time_coverage_duration = "P1D"
	attribute time_coverage_end = "20030921T235959Z"
	attribute time_coverage_resolution = "P1D"
	attribute time_coverage_start = "20030921T000000Z"
	attribute title = "ESA CCI SCIAMACHY WFMD XCH4"
	attribute tracking_id = "2bfe8774-57c5-4b53-8dd0-db2ee6cc1fe6"
dataset /altitude: float32, shape (6215)
	attribute comment = "Average surface altitude"
	attribute long_name = "altitude"
	attribute standard_name = "altitude"
	attribute units = "m"
dataset /ch4_profile_apriori: float32, shape (6215, 20)
	attribute comment = (text block)
| A priori dry-air mole fraction profile of atmospheric methane in ppb.
| All values represent layer averages within the corresponding pressure levels.
| Profiles are ordered from surface to top of atmosphere.
	attribute long_name = "a priori dry air mole fraction profile of atmospheric methane"
	attribute units = "1e-9"
dataset /corners_dim: float32, shape (4)
dataset /h2o_column: float32, shape (6215)
	attribute comment = "Retrieved vertical column amount of water vapour"
	attribute long_name = "vertical column of water vapour"
	attribute units = "g cm-2"
dataset /land_mask: int8, shape (6215)
	attribute comment = "0=ocean, 1=completely land covered"
	attribute flag_meanings = "ocean land"
	attribute flag_values = 0, 1
	attribute long_name = "land mask"
dataset /latitude: float32, shape (6215)
	attribute comment = "Center latitude of the measurement"
	attribute long_name = "latitude"
	attribute standard_name = "latitude"
	attribute units = "degree_north"
	attribute valid_range = -90.0, 90.0
dataset /latitude_corners: float32, shape (6215, 4)
	attribute comment = "Corner latitudes of the measurement"
	attribute long_name = "corner latitudes"
	attribute units = "degree_north"
	attribute valid_range = -90.0, 90.0
dataset /layer_dim: float32, shape (20)
dataset /level_dim: float32, shape (21)
dataset /longitude: float32, shape (6215)
	attribute comment = "Center longitude of the measurement"
	attribute long_name = "longitude"
	attribute standard_name = "longitude"
	attribute units = "degree_east"
	attribute valid_range = -180.0, 180.0
dataset /longitude_corners: float32, shape (6215, 4)
	attribute comment = "Corner longitudes of the measurement"
	attribute long_name = "corner longitudes"
	attribute units = "degree_east"
	attribute valid_range = -180.0, 180.0
dataset /orbit_number: int64, shape (6215)
	attribute comment = "Orbit number"
	attribute long_name = "orbit number"
	attribute units = "1"
dataset /pressure_levels: float32, shape (6215, 21)
	attribute comment = "Pressure levels define the boundaries of the averaging kernel and a priori profile layers.\nLevels are ordered from surface to top of atmosphere."
	attribute long_name = "pressure levels"
	attribute units = "hPa"
dataset /pressure_weight: float32, shape (6215, 20)
	attribute comment = "Layer dependent weights needed to apply the averaging kernels."
	attribute long_name = "pressure weight"
	attribute units = "1"
dataset /scene_number: int16, shape (6215)
	attribute comment = "Ground scene number (per orbit)"
	attribute long_name = "ground scene number"
	attribute units = "1"
dataset /sensor_zenith_angle: float32, shape (6215)
	attribute comment = "Sensor zenith angle is the angle between the line of sight to the sensor and the local vertical."
	attribute long_name = "sensor zenith angle"
	attribute standard_name = "sensor_zenith_angle"
	attribute units = "degree"
dataset /solar_zenith_angle: float32, shape (6215)
	attribute comment = "Solar zenith angle is the the angle between the line of sight to the sun and the local vertical."
	attribute long_name = "solar zenith angle"
	attribute standard_name = "solar_zenith_angle"
	attribute units = "degree"
dataset /sounding_dim: float32, shape (6215)
dataset /state_number: int16, shape (6215)
	attribute comment = "State number (per orbit)"
	attribute long_name = "state number"
	attribute units = "1"
dataset /surface_albedo_1560nm: float32, shape (6215)
	attribute comment = "Retrieved surface albedo at 1560nm"
	attribute long_name = "surface albedo at 1560nm"
	attribute units = "1"
dataset /surface_albedo_1630nm: float32, shape (6215)
	attribute comment = "Retrieved surface albedo at 1630nm"
	attribute long_name = "surface albedo at 1630nm"
	attribute units = "1"
dataset /surface_albedo_750nm: float32, shape (6215)
	attribute comment = "Retrieved surface albedo at 750nm"
	attribute long_name = "surface albedo at 750nm"
	attribute units = "1"
dataset /time: float64, shape (6215)
	attribute calendar = "standard"
	attribute long_name = "time"
	attribute standard_name = "time"
	attribute units = "seconds since 1970-01-01 00:00:00"
dataset /xch4: float32, shape (6215)
	attribute comment = "Retrieved column-averaged dry air mole fraction of atmospheric methane (XCH4) in ppb"
	attribute long_name = "column-averaged dry air mole fraction of atmospheric methane"
	attribute standard_name = "dry_atmosphere_mole_fraction_of_methane"
	attribute units = "1e-9"
dataset /xch4_averaging_kernel: float32, shape (6215, 20)
	attribute comment = (text block)
| Represents the altitude sensitivity of the retrieval as a function of pressure.
| All values represent layer averages within the corresponding pressure levels.
| Profiles are ordered from surface to top of atmosphere.
	attribute long_name = "xch4 averaging kernel"
	attribute units = "1"
dataset /xch4_quality_flag: int8, shape (6215)
	attribute comment = "0=good, 1=bad"
	attribute flag_meanings = "good_quality potentially_bad_quality"
	attribute flag_values = 0, 1
	attribute long_name = "quality flag"
dataset /xch4_uncertainty: float32, shape (6215)
	attribute comment = "1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric methane (XCH4) in ppb"
	attribute long_name = "1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric methane"
	attribute units = "1e-9"